(2)With severe fragmentized situation in 2001,the average area of the parcels,the maximum area of the parcel and the perimeter of the maximum parcel decreased by 71.02%,71.08% and 64.76% respectively,compared with that of 1969.While the SL increased from 0.78 to 0.93.This research achievement can provide scientific basis for the protection and rational utilization of wetlands in the Basin.

The private enterprises' social responsibility includes specifically to staff's responsibility,consumers' responsibility,creditors' responsibility,environment,resources protection and reasonable use responsibility and the community's responsibility and charitable behavior.

To optimize class teaching, promote teaching reform and improve teaching quality, problems in multimedia courseware making and using are discussed. An analysis on a reasonable use of multimedia technology in teaching is made.

The principles for the rational utilization of the effect of stream mixing in the ejector ahead of the choking section are indicated; the use of these principles permits a several-fold increase of the compression ratio of the supersonic ejector.

Wetland resource protection and rational utilization in China

For the special national conditions of China, higher population pressure, China should carry out wetland resource protection and rational utilization, not only protection.

For the suntainable development of ecosystem and the protection and rational utilization of resources, it is of great importance to study these internal relationships and seek rational regulation and control measures.

Rational utilization of wood highes on adequate knowledge of its behavior under a wide range of conditions.

The aim of this research was to investigate the effects of modafinil, a new wake-promoting agent, on vestibular function during 24 h sleep deprivation (SD) so as to provide experimental evidence for the rational use of this drug among air crew.

Soils of the Zeya-Bureya interfluve and their rational use

One molecule of FeS is 4 times more than that of Na2SO3 from a view point of rational use of mineral resources.

Rational use of oral antibiotics for pediatric infections

In order to put wetland resources to rational use and protect wetland ecological environment, some effective measures should be taken.